Question

A uniform metal rod of 2mm2 cross-section is
heated from 0°C to 20°C. The coefficient of linear
expansion of rod is 12 * 10-6°C^-1. Its young's
modulus of elasticity is 10^11 N/m2. The energy
stored per unit volume of rod if the rod is free to
expand is -
(1) zero
(2) 1500 J/m^3
(3) 5760 J/m^3
(4) 1440 J/m^3​

Answer 1

Answer:

step by step explanation

Explanation:

A uniform metal rod of 2 mm2 cross-section is heated from 0°C to 20°C. The coefficient of the. linear expansion of the rod is 12 x 10-6/°C.08-Dec-2019